Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '545386535ae293f7d1980f1b286981da6cc921cba45019aecbde32411f718f57' 
  AND token = 'EHkUWE60UmPFjSYCs9Wxtx/OSdlZTeonYPHw4QyxaSE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}